Spiral Staircase Regulations

Vertical clearance above any stair tread to any overhead obstruction is at least 6 feet 8 inches 203 cm as measured from the leading edge of the tread. 1917 121 b 1 stairways shall conform to the minimum dimensions of figure f 1. This document is summarised in the table below with categories given for each spiral application and the relevant maximum riser heights and minimum widths.

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1067mm diameter can have 1 extra victoria or plain baluster.

Spiral staircase regulations.

All building regulation spirals must comply with the 100mm sphere rule i e there must be no gaps greater than 99mm anywhere on the spiral staircase. Spiral or helical staircase regulations part k of the building regulations provides the guidelines for ensuring occupants or visitors to a house are protected against falling collision or impact. 1910 25 b 3 stairs have uniform riser heights and tread depths between landings. Spiral stairways shall meet the following requirements.

These specifications show standard stair dimensions for height tread degree rotation degree and many more details for each. Spiral staircase regulations for commercial and public use category c small semi public d semi public or e public stairs tend to be for staircase projects in commercial and public spaces. Our spiral stair building code and ibc stair code specifications provide technical details about the different code and non code packages we offer for commercial and residential projects. K1 building regulations states that there is no minimum width requirement for a spiral staircase but it should be built in accordance with bs 5395.

The rules within part k don t apply to spiral or helical staircase designs. The document governing spiral staircase building regulations in the uk is british standard 5395 part 2. So if the client is ordering a scandinavian parisienne or a victoria 1067 or 1194mm it must have riser bars. It is important to note that where there is a contradiction between bs 5395 part ii and part b and m of the building regulations part b and m take precedence.

The usable surface of the stair tread must be a minimum of 26 inches in width measuring from the center of the staircase to the outer handrail. In situations where space is limited the diameter is at the discretion of the building inspector. Spiral stairs must meet the vertical clearance requirements in paragraph d 3 of this section. The clear walking path on a particular staircase.

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